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Old 07-04-2016, 07:08 PM   #1
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New kitchen, plumbing nightmare


We just had a new kitchen installed, and we are now trying to get the plumbing hooked up again; problem is, there's not enough vertical separation between the drains and the drain pipe - only about 2-3 inches. There's a garbage disposal that's going to be installed on the right side, and I really need the drain pipe to drop about 6". I think that'd give me enough room for the P-trap and the drainage from the disposal unit.

I'm looking at the drainage pipe, and after it goes through the wall it bends out to the right, towards the cold water line, which is only about 7" away. I don't know what to expect if I rip the wall out and try to do it myself. I'm fairly comfortable with most DIY projects of the construction/drywall/minor electrical work varieties, but this would be my first plumbing project.

House was built in Washington state in '52. Haven't bothered trying to find the studs, as there's so much piping, my studfinder won't do me any good, so I have no idea if the pipes run through studs, or if all the work I'll be doing (or will have done) will be between studs. If anyone has any idea what I might be in for, I'd appreciate your insight.
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Old 07-04-2016, 07:12 PM   #2
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Re: New kitchen, plumbing nightmare


It won't let me post a picture, but there's one in my album.
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Old 07-04-2016, 07:54 PM   #3
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Re: New kitchen, plumbing nightmare


If you do open the wall. It will be a good time to replace all the old galvanize pipe you can and replace the supply line shut offs as well. Just a suggestion.

Cant really predict what you will fine in an old 50's house. Just be prepared for anything.

Post pictures as you go along the plumbers here will help you out.
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Old 07-04-2016, 08:04 PM   #4
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Re: New kitchen, plumbing nightmare


kyle's pic of work in progress.


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Old 07-04-2016, 09:00 PM   #5
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Re: New kitchen, plumbing nightmare


As Jmon suggested, open the wall and see what you are up against.

This a a common problem---we will help you figure out the simplest solution.
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Old 07-04-2016, 09:04 PM   #6
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Are you on a public sewer or a private system like a septic tank? If the latter you might want to reconsider the disposal.
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Old 07-05-2016, 01:24 AM   #7
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Re: New kitchen, plumbing nightmare


We're on the city sewage system.

Honestly, due to contractor delays, our kitchen has been out of commission for almost 3 weeks now, and the wife's getting antsy. I think I'm just going to extend the pipe into the P trap a little longer than it should be for now, and when I get back from deployment in a few months, I'll dig into the wall and see what's there. I'll see about adding the disposal system then, too.

Looking forward to other threads in the mean time, though! Thanks, guys.
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Old 07-05-2016, 02:26 AM   #8
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Re: New kitchen, plumbing nightmare


Galvanized pipes....that is going to be your next issue.

Have you test fitted the disposal yet? They drain out the side so you might be ok.
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Old 07-05-2016, 08:44 AM   #9
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Re: New kitchen, plumbing nightmare


Would it help to switch out the disposer to left? Does the disposer drain have to point down (is it keyed, I forget?). The t that has the trap may be modified to fit directly to the drain flange with shorter tailpiece with pvc glue/rubber connector, etc.
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Old 07-05-2016, 11:23 AM   #10
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Re: New kitchen, plumbing nightmare


Measured and test fitted, and it'll put the disposer drain at just about the same level as the bottom of the trap.
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Old 07-05-2016, 09:21 PM   #11
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Re: New kitchen, plumbing nightmare


Quote:
Originally Posted by oh'mike View Post
As Jmon suggested, open the wall and see what you are up against.

This a a common problem---we will help you figure out the simplest solution.
It's just a guessing game until you do this....
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Old 07-07-2016, 10:52 PM   #12
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Re: New kitchen, plumbing nightmare


Another very unfortunate situation where the kitchen designer and installer do not know what they are doing and the homeowner is left to sort out their mistakes. Happens all the time. I worked closely with professional kitchen designers for many years on hundreds of kitchens because they knew enough to make sure everything would work with their design. What would have been a relatively simple plumbing adjustment has become a big problem that has to be fixed by tearing through the back of the new cabinet.

At the least, I would insist the kitchen designer and installer provide at no charge, a replacement back panel for the cabinet.
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